After converting 70+% of a project at work from Django to TurboGears over a week and a bit, and starting at rewriting an existing TurboGears project of mine to Pylons, quite a few things have interested me about the exercises.

Standard disclaimer about this just being my personal feelings and not some scientific test applies.  I've used TurboGears (90% own projects) a lot longer than I've used Django and Pylons, and I've used Django (50% work projects) a little bit more than I've used Pylons (only own projects so far).  I also prefer tea to coffee, tcsh to bash, and winter to summer.

... 

I haven't yet had the opportunity to spend much time looking at Genshi (nee Markup), which will probably follow Kid as the default templating engine in TurboGears. One thing Kid lets me do that it doesn't yet seem obvious to me how to do in Genshi is this trick.